Safety razor



R. S. M WATTERS SAFETY RAZOR March 20, 1945.

7 Filed Jan. l3. 1944 Patented Mar. 20, 1945 7 Robert Samuel Mcw rs, Ottawa, Ontario,

Canada Application January 13. 1944'. Serial No. 518,191

r In Canada Mai-ch22, 1M3

7 Claims, (01., till-H68) This invention relates to razors and more particularly to the type known as safety razors.

An object of the invention is to provide a razor structure wherein exceptionally rapid and con--,

venient assembly and d'isassembly of the blade holding; members for removal and insertion of blades is provided. A further object is to provide a razor structure which is simple in form for low cost manufacture and which may readily be constructed of a variety of materials. Another object is to provide efiicient means for clamping the various parts of the razor together with a mini mum of effort.

I These and other objects and advantages of the invention will become apparent from the following description'of the invention, with particular.

reference to the accompanying drawing, in which,

Figure 1 is a sectional end elevation of a razor in accordance with the invention,

Figure 2 is a plan view of the razor,

Figures 3' and 4 are plan views of the lower and upper bladeholding members, respectively,

Figure 5 is a sectional elevation of a portion of the razor handle,

Figure 6 is a transverse section on line 6'6 of Figure 5,

Figure '7 is; an elevationof the upper portion of the handle of a modified form of razor,

Figure 8 is an elevation showing blade and blade holding members, assembled on the handle of. Figure 7', and

Figure 9 is a top view of the handle shownv in Figure 7.

- Referring to the drawing, 50 isthe upper blade holding member, 5| is the lower blade holding member, 53 is the blade, which may be of ordinary type, and 52 the handle,

The member 50 has an upper convex surface and a lower concave surface. It is also provided with a longitudinally extending slot 54. As shown in Figure 4, the ends of the slot are relatively narrow as indicated at 55 and adjacent such narrow portions are enlarged substantially circular portions 56. At the central portion of the slot there is also an enlarged substantially circular portion 51, which, however, is of somewhat less diameter than that of the portions 56.

The member 5| is somewhat wider than member 50 and has downwardly curved edges. It also has a, longitudinally extending slot 58, which coincides with the slot 54 in member 50 but does not have portions corresponding to the narrow end portions 55 nor the central enlarged portion 51. It has, however, enlarged substantially circular portions 59 at either end corresponding to the portions Adjacent each portion 59 is a lug 59", which is adapted to enter the ends 55 of slot 54 in order to position the members and blade with respect to each other The member 5! is also provided with lather receiving grooves 50 and openings 51.

The handle 52 is provided with a screw-threaded bore 62 in the end thereof. The bore is adapted to receive the screw-threaded lower end of a rod 63 having an end portion 64 extending above the handle; The portion' 54, is of substantially fiattened form in cross-section, being of generally oval configuration as shown in Figure 6. The end oi portion 54 is formed with a knob or enlargement 55, the sides of which are curved gradually downwardly into the plane of portion 64.

a In applying the handle to the assembled blade and blade holding members, the rod portion 64 is passed through the enlarged portions 56 and 59 at one end of the slots 54 and 58, such portions being "of" a size to'permit easy passage of the knob The blade will of course be provided with a longitudinal openingtherein of a size suflicient to permit free communication through the registered slots. The rod 63 will previously have been unscrewed from the bore '62 sufficiently to permit the knob 55 to extend freely above the assembled member; The'rod portion 64 is now slid along the slots, the flattened form of this portion enabling it: to enter the narrow intermediate por tions of the slots, and the curved contour thereof reducing to a minimum the frictional resistance to such sliding" movement. When the rod is positioned at the central point of the slots, the handle is rotated to screw the rod into the same, the rod being held against rotation by reason of engagement of the flat portion 64 with the edges of the slots as shown in Figure 2. As the knob 65 moves downwardly with the rod, it fits into the central enlargement 5! of slot 54, the adjacent edge portions of the member 50, which are curved to fit the curved side wall of the knob, constituting a seat for the knob. Further downward movement of the knob exerts a clamping action on the assembled members and blade, which are engaged on one side by the end of the handle and on the other side by the enlargement or extension on the end of the clamping rod. The members are readily disassembled by following a reverse procedure.

In order to facilitate convenient separation of the assembled members, the member 50 may have serrated edges 66 at either end thereof and member 5| may have curved recesses 61 at either end thereof.

13 has its ends seated in an annular groove 14,

formed in the side wall of the handle closely adjacent its end. The ends of the spring may be cut away, as indicated at 16 so that they extend partly around the reduced portion 15 of the handle. A slot 1! extends inwardly from one side of the spring to accommodate passage of the rod 10 when placing the spring in position on the "handle.

The handle is applied to the assembled blade s 53 and blade holding members 50 and 5| in the same manner as previously described, but it is necessary to manually compress the assembled members against the action of the spring until the rod Hlhas been moved into the narrow intermediate portions of the slots whereby the knob 12 engages the side edges of the slot in the upper member, which is provided with the positioning enlargement 5'! for the knob. Figure 8 shows the various parts in assembled, compressed relation.

If desired, the'rod 10 may have limited inward or outward movement to provide for adjustment of blade tension. While two embodiments of the invention have been described and illustrated, it will be appar-,

ent that various alterations may be made in details thereof without departing from the spirit and scope of the invention as defined in the ap pended claims.

Iclaim:

1. In a safety razor having a blade, a handle and upper and lower blade holding members, means for clamping said members and blade in compressed condition comprising a rod mounted in and extending from the end of said handle, and a knob on the end of said rod, said members having aligned openings therein for passage therethrough of said knob and aligned slots therein for movement therealong of said rod, said slots communicating with said openings and being of insufiicient width to permit passage therethrough of said knob.

2. A safety razor as defined in claim 1, said rod being flattened in cross section, the thickness of the thickest portion thereof being such that complete rotation of the rod when positioned in said slots is rendered impossible.

3. A safety razor as defined in claim 1, said upper member having a positioning seat for said knob.

4. A safety razor as defined in claim 1, said rod having screw-threaded engagement with said handle.

5. In a safety razor having a blade, a handle and upper and lower blade holding members, means for clamping the members and blade in compressed condition comprising a rod fixed to and extending from the end of said handle, a knob on the end of said rod, a seat for said knob on said upper member, said member having aligned openings therein for passage therethrough of said knob and aligned slots therein for movement therealong of said rod, said slots communicating with said openings and being of insufiicient width to permit passage therethrough of said knob, and a spring carried by said handle and exerting pressure on said lower member when said knob is in engagement with said seat.

6. In a safety razor having a blade, a handle and upper and lower blade holding members, means for clamping said members and blade in compressed condition comprising a rod mounted in and extending from the end of said handle, and a knob on the end of said rod, at least one of said members having an opening therein for passage therethrough of said knob and a slot therein for movement therealong of said rod, said slot communicating with said opening and being of insuificient' width to permit passage therethrough of said knob, said slot having a slightly widened portion constituting a positioning means for said knob.

7. In a safety razor having a blade, a handle and upper and lower blade holding members, means for clamping said members and blade in compressed condition comprising a rod mounted in and extending from the end of said handle, and a knob on the end of said rod, at least one of said members having a pair of openings therein for passage through either of the openings of said knob and a slot therein extending from one opening to the other for movement therealong of said rod, said slot being of insufiicient width to permit passage therethrough of said knob, said slot having a slightly widened portion substantially midway between the ends thereof constituting a. positioning means for said knob.

ROBERT SAMUEL MQWATIERS. 

